WP plugin for pdf, excel, ppt files

How to display Excel, Powerpoint, or PDF file on your blog?
Or you might ask how to display excel spreadsheet in a WordpPess site?
You can embed the files, you can use them as link that open in a new page or use a plug in.
Wordpress has a WYSIWYG editor where you can copy paste from excel. How does it look on your current theme is depends on how the theme though.
There are a few good plugins to do this job.

GroupDocs Viewer
Lets you embed the GroupDocs Word, Excel, Powerpoint, PDF Viewer into WordPress for your documents.
This is an online document viewer that lets you read documents in your browser, regardless of whether you have the software that they were created in. You can view many types to word processing documents (DOC, DOCX, TXT, RTF, ODT), presentations (PPT, PPTX), spreadsheets (XLS, XLSX), portable files (PDF), and image files (JPG, BMP, GIF, TIFF). For each file, you get a high-fidelity rendering, showing the document just as it would if you opened it in the software it was created in. Layout and formatting is retained and you see an exact copy of the original.
More info visit here: /plugins/groupdocs-viewer/

dhtmlxSpreadsheet
This plugin allows you to quickly create an Excel-like, editable spreadsheet with basic cell formatting and math functions support.
With dhtmlxSpreadsheet, you can quickly add a nice-looking, editable data table on your WordPress page. The plugin takes the content from the database table and displays it in an Excel-like spreadsheet with basic cell formatting, math functions, and keyboard navigation support. It offers an effective solution if you need to organize and share some data online in a table view.
More info visit here: /plugins/dhtmlxspreadsheet/Embedding Google Docs into your blog
You can easily embed your Google Docs spreadsheets, documents, forms, and presentations into your WordPress blog by copying and pasting the embed code. Before you share a Google Docs file, please make sure that it’s not private. If it is, you’ll be the only one who can see it. If your Google Docs file is private, click the Share link at the top of the screen to make it public. Please also remember Google Docs have been merged into Google Drive and according to Google Drive Help, you can set up offline viewing in Google Docs, so that you can still view the Google Docs files while you are offline.
More info visit here: /google-docsshare public